Manufacture of turbine-vanes.



PATENTED OCT. 2, 1906.

0'. ROTH. MANUFACTURE OF TURBINE VANE$.

APPLICATION FILED 10130.3. 1905.

Fig.6.

enables vanes of any desired shape to be vanes before they are divided up;

specification. My invention relates to the manufacture UNITED STATES PATENT oFFIon.

CARL ROTH, OF MUNICH, GERMANY, ASSIGNOR TO MELMS & PFEN-- NINGER, GESELLSCHAFT Ml'l BESCHRANKTER HAFTUNG, OF

MUNICH-HIRSCHAU, GERMANY.

A MANUFACTURE OF TURBINE-MANES;

Application filed December 8,

Specification of Letters Patent.

Patented Oct. 2, recs. I

1906. suninojzaasa'l. 4

To all whom it may concern:

Be it known that I, CARL ROTH, engineer, a citizen of the Republic of Switzerland, and a resident of Munich, Miihlbauerstrasse 2, Bavaria, Germany, have invented a certain new and useful Improvement in the Methods of the Manufacture of Turbine-vanes; and I do hereb declare the following to be a full, clear, an exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which'form a part of this of turbine-vanes; and my improved method manufactured with great accuracy, each vane being at the same time provided with a projection serving for securing it or as adistance-piece.

The accompanying drawings illustrative of the invention s ow in Figures 1 and 2 two forms of blanks used in the manufacture of the vanes. FigF13 shows a mandrel, blank, and die-ring. 'gs. 4 and 5 show, respectively, a cross-section of the mandrel and plan view of the 6 shows vertical and horizontal sections of the comIpleted i 7 and 8 show vertical sectionsofit fini slled varies, the last three figures being on a large sca e.

' The blank used in the process is formed of metal pieces-for instance, cast or stamped and eit er (plain or cup-shaped, as shown in Figs. 1 an 2. These disks are forced, b means of a suitably-shaped mandrel, throng a die-ring of suitably-shaped cross-section. The inner sides of the vanes are formed by the mandrel according to its coutour, while at the same time the corresponding outer vane profiles are made by the inner ring-sun face, as illustrated in Figs. 3, 4, and 5. The disk or blank I) is placed on or under the mandrel a, and thereupon the mandrel is forced in the direction of the arrows, thus forcing the blank throu h the fixed die-ring c. The inner diameter of the die is sli htly smaller than the outer diameter of the b ank. The blank is in this way com ressed about the mandrel and shaped as in cated in dotthickene through a suitably s ted lines, Fig. 3, while at the same time the blank assumes the sha e of the vane. This process can'be repeate several times, a diering of smaller diameter bein used at each operation until a sleeve of the ength desired a is obtained.

Fi 6 shows a finished vane-sleeve, from whic after a hole a has been bored or stamped out in the center of the base part It finished vanes can be obtained by cutting through on the lines'x.

' In ig. 7 the projection f, formed from the base It andserving as a means for securing the vane or for use as a distance-piecefls shown;

By ma the end of the mandrel of suitable sha e t e vanes can be made with a root portion of anydesired sha e, as shown at gin Fig. 8. i

aving thus described my invention, what I claim as new, and desire to secure byLetters Patent of the United States of America, is

1. The methodof manufacturing'turbinevanes consisting of forcing a metal blank, by means of a mandrel having a series of faces corresponding in shape to the desired contour of the inner surfaces of the vanes,

inner faces corresponding to the outer sur- 8o through a suitably-shaped die-ring having faces of the vanes and finally cutting longitudinally through the cylinder so formed to produce a series of vanes corresponding in number to the faces on they mandrel substantially as set forth.

2.. The method of manufacturing turbinevanes consisting of forcing a metal, blank,

b meansof a mandrel having a series of Iongitudinal curved surfaces, through a corresponding suitably-fluted die-rin and finally cutting longitudinally throug the cylinder so formed to produce aseries of vanes corresponding in number to the faces on the mandrel substantially as set forth.

3. The method of manufacturin turbinevanes consisting of forcing a metafiilank, by means of a'mandrel having a series of faces corresponding in shape to the desired con tour of the inner surfaces of the vanes, ped die-ring having inner faces correspon ing to the outer surfaces of the vanes, removmgthe central portion of the base of thecylinder of'connected vanes so formed and finally longitudinally through the cylinder to produce a series of vanes corresponding in number to the faces on the mandrel substantially as set forth.

4. The method of manufacturin turbinevanes consisting of forcing a metal lank, by means of a mandrel having a series of longitudinal curved surfaces, through a corresponding suitably-fluted die-rlng, removing the central portion of the base of the cylinder of connected vanes so formed and finally cutting longitudinally through the cylinder to produce a series of vanes corresiponding in number to the faces on the manrel substantially as set forth.

5. A connected assemble e of turbinevanes formed from a metal lank stamped between a shaped mandrel and corresponding dies consisting of longitudinal curved sections connected together at their longitudinal edges in the form of a cylinder, and an inwardly-extending flange at the base of said cylinder substantially as set forth.

6; A connected assembla e of turbinevanes formed from a metal ilank stamped between a shaped mandrel and corresponding dies consisting of longitudinal curved sections connected together at their longitudinal edges-in the form of a cylinder, thickened roots on said sections and an inwardlyextending flange at the base of said cylinder substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of tWo subscribing Witnesses.

CARL ROTH.

Witnesses:

ULYSSES J. BYWATER, ABRAHAM SCHLESINGER. 

